Shoe-bottom filler



Patented Mar. 5, 1929.

UNITED STATES PATENT. OFFICE.

ANDREW THOMA, OF CAMBRIDGE, MASSACHUSETTS, ASSTGNOB TO NORTH AMERICAN CHEMICAL COMPANY, 013 BOSTON, MASSACHUSETTS, ACORPORJATION OF MASSA- CHUSETTS.

No Drawing.

My invention is a shoe-bottom filler of the kind or type set forth in my Patents Nos. 832,002, 861,555, 945,294, 1,032,312, 1,114,819, 1,115,988, 1,120,634, 1,121,054, 1,121,688,

1,121,689, 1,134,931, 1,136,980, 1,137,679, 1,138,909, 1,138,910, 1,202,454, 1,203,435, 1,227,696, and is .a development of or improvement on this kind or type of filler.

One of the particular aims of this invention is to produce a uniform, "dependable filler of the segregated, loose or granular variety referred to in many of the aforesaid patents, the first reference being in Patent No. 1,032,312 (at page 4, lines 58 to 128),

and hence, in its preferred embodiment, altho not restricted thereto except in a few of the appended claims, I provide a binder mass which is highly sensitive, i. e., very stlcky, very adhesive, very low melting and of such consistency that when cold and before use it will not prevent the mixed filler from being easily separated or detached in segregated portions at will from the package or mass-body and yet capable of being handled and remaining semi-plastic with latent stiffening qualities.

, Another object is ,to produce a superior slippery, sleek filler, and the radically new component to this end is anon-absorbent sleeker, capable of giving body and separat-- ing but not dulling (or neutralizing or absorbing) the viscous binder. Such a compo nent is comminuted mica, deriving its sleeking ability and function mechanically as distinguished from chemically, and any ingredient having said\ physical .characteristics when mixed in the filler is for the purposes of my filler an equivalent of mica.

This filler is especially adapted to soft 4 wax-tailings, but instead of availing of the regular commercial soft, smeary wax-tailings of petroleum rendered usable by-the agents and combinations set forth in the patents above, I prefer 'to derive the desired soft sticky quality by treating or cutting the better grade, 1. e., the hard or semi-hard wax-tailings (as usually so designated commercially) with Lima oil, which I have found produces the soft, sticky wax-tailings without the objectionable oily, smeary features,but softer, stickier and lower melting.

SHOE-BOTTOM FILLER.

Application filed December 20, 1921. Serial No. 523,753.

Then, I introduce a retarder, restrainer or stiffener of sulphite pitch (found in the market under the name of goulac) and the fine mica, along with ground cork or other bodymaterial. As the process and mostof the functions, physical consistencies or characteristics and conditions are much the same as in Patents 1,121,689 1,136,980 and 1,138,910 it is suflicient to refer to said patents for full and detailed explanations. This is a new species and so claimed, and further peculiarities and distinguishing steps and features are set forth later in this specification.

Sulphite pitch (especially in the form of concentrated liquor, or when dry and powdered) is a vegetable sleeker and separator and forms an aqueous paste, being selected because cheap, miscible, instantly responsive to steam, easily controlled as a diluent, and may be so used as to act as a tenuous stop or varnish, and readily cooperates with all the other glues and restrainers and powders,- jellies, emulsions, waxes, gums and sleekers, of my patents aforesaid. It is readily soluble in water, is of such a nature as to combine excellently with the wax tailings, altho a feeble binder in itself, it functions as a stiffener to the tailings, as a heat resistant, a toughe'ner, and as a means of tempering the binder, and in its powdery condition it acts as a duller in the cork and tailings mixture, andwith the finely ground mica becomes a separator, being latent until the filler is steamed whereupon it sets as a stiffener and unites sufiiciently with the wax tailings to sufficiently resist moisture thereafter in the use of the shoe., The sulphite pitch or mucilaginous component may be introduced as a dry powder (and then acts as a separator along with the mica) or as a thin syrup or thick jelly. The extra soft wax-failings (or equivalent, using this term as in said patents) required to make the filler segregable or so it will pull easily apart when cold before use, necessitates a larger amount of the powdery stiff-setting 'muci-.

laginous matter. .However, when once set in a shoe bottom the wax-tailing binder influenced by the mucilaglnous component, which then also acts as a co-blnder, will not,

yield in its structure to normal heat and will retain its shape, cohesion and adhesion (to vthe innersole).- Made as. stated the filler when set is elastic, as well as possessing all the other qualities of this type of filler.

The finely ground mica not only renders the filler slippery but acts or influences the Waxy binder and the dry mucilaginous'matter to bring about the ready separation of the filler into the desired segregated or segregable portions or in other words materially aids inv producing this loose type of filler when the filler is cold and the sulphite pitch or other retarder is latent as a retarder and stiflenen' In such condition the segregable filler Without thisuion-absorbent inert separator would require a too soft Wax-tailings binder so that it would be dangerously penetrative and not enough binding and would require too much mucilaginous (or gelatinous) matter (to dull the too soft tailings) so that it would later be too hard, when set, and too brittle and would not. flex, but with the said non-absorbent inert separator (in addition to the drymucilaginous separator and retarder). both the other components can be restricted within the limits of safety in the respects noted and produce a highly sensitive, accurately balanced [and yet segregable filler. It is a filler capable of being shipped in paper or canvas bags, and resembles throughout the latter.

in its preferred form Grape-Nuts or ground pop-corn, only a darker brown than the Thisfine mica introduces such a special and unique slipperiness that it makes practicable the use of ground leather and other short fibrous waste not hitherto spreadable.

In use the filler is subjected to steam heat and moisture which softens the wax-tailings, develops the stickiness of the previously dry mucilaginous matter, preferably sulphite pitch into a sticky adhesive, separating or subdividing and spreading the talilings, and finds in the light-weight, nonabsorbent mica an excellent sleeker, separator or subdivider, which does not absorb the binder nor the cobinder nor the water and makes a good filling within and ranular mass without adding undue weig t. The inert flakes,-being non-absorbent and depending on no chemical action-or reaction on the rest of the filler, act mechanically as a sleeker, like smooth, polished, slippery scales'or flakes over which .the knife slides or slips 0! shoots and skates, especially when the mica is moist or when lubricated with the wet paste, melted tailings, or other moisture, or

moisture-like element or condition. I bel1 eve my present invention is the first to employa mechanical sleeker and hence. I'

above listed) invention does not primarily depend upon any formula, inasmuch as I merely add these ingredients to the filler mass as already provided ('accordingto my previous inventions). In case the filler is to be of the preferred form, viz, segregableor easily separated or pulled apart, before use, it requires more powdered separator and less tough cohesion than if it is not to have said preferred character. Some of my claims are limited, therefore, to one specific element and some to another. It will be understood that when the claim permits, I may use, for instance, any solvent or diluent of the wax-failings which has no deterrent influence on the normal stickiness or oils of a lubricating nature, or I may add freer flowing, sticky materials which act to render the Wax-tailings soften but also stickier. Instead of Lima oil, I may use paraflin oil or combinations of thin oils and rosins or pitches. I may use sticky rosin oil or naphthaline or non-evaporating liquids (all as mentioned in my patents So, instead of sulphite pitch or supplementing it, I may use other mucilaginous (gelatinous) materials or one of more of the other restraining agents men tioned in my patents above listed. This is referred to as gluey in my Patent 945,294 being a vegetable glue as there defined '(and in my Patent 1,134,931) and is the heat resistant, Water absorbent element,

while the resinous paste (or gummy or waxy components as defined page 2 line 7 0 of Patent 1,121,688) is the heat sensitive or heat responsive and water repellent element. Other inert comminuted materials or powders, either absorbent or non-absorbent, may be used to help the mucilaginous powder to function as a duller or retarder and separator in the mass; The reason that any pitchy, waxy, tarry, water-repellent material may be used within the range of my patents listed above is because the filler is not dependent solely upon this portion toform the subsequent tough union. Nor does it depend alone -on these nor on the two binding components tomake it segre gable before use, as the mica separator is a very considerable helper. Because of this also less heat is required for making and applying the filler and less steam in applying it. The Waxy element forms a permanently sticky, flexible binder, the mucilage sets the structure against destruction by. heat, giving the filler a firm set without seriously depriving the waxy-pitchy component of its tacky and heat-responSiVfi nature. If introduced as a powder the mu cilaginous element dullsthe waxyelement (by its absorbing action and hence neutralizing effect on the latter) but only to Jitsgproportionate extent within.,the. mass and when thereafter moistened by hot steam vapor and then applied in the shoe-bottoms it functions within the setting mass by giving the mass a heat resisting, tough structure which is minutely diffused throughout the mass and enters into close union with its principal co-binder so that the filler becomes ultimately tough and leatherlike in the shoe. A heated laying tool or blade works best with the waxy component but the pasty or mucilaginous component tends The filler when thus compounded and developed may be applied hot or cold with a heated blade or with a cold blade coated with a sleeking liquid.

nous component, a new mucilaginous agent or component, a new control of the two foregoing combined as binders so that each functions according to its own particular nature, a new non-absorbent separator and controller which materially furthers the production of a segregable filler, a permanent slippery sleeker, a light, fluffy powder (the mica) which enters as a body giving member of the filler mass without introducing objectionable properties.

Having described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A shoe filler composition of the type set forth having admixed through the mass a permanently comminuted body component which is non-absorbent and permanently mechanically slippery under the conditions of application and use of the filler in a shoe factory.

2. A shoe,filler composition of the type set forth having admixed through the mass a permanently comminuted body component which is non-absorbent,impermeable,

inert and permanently mechanically slip-- pery under the conditions of application and use of the filler in a shoe factory.

- 3. The combination with a shoe-filler of the type set forth, composed of a com-' a sticky binder to a self-sustaining consistency but sluggishly fluid under moderate heat. of a comminuted body component which is non-absorbent, always inert and slippery and in which the particles are also sufiiciently large and impervious to constitutea barrier to separate and mechanically sub-divide the binder of the filler mass or body.

4. A shoe filler of the type set forth including in its composition a non-absorbent slecker and separator" of comminuted mica.

5. A shoefiller composition comprising \vax-tailings, comminuted filler material, and ground mica.-

6. A shoe-filler composition, comprising a viscous binder, sulphite pitch, and comminuted body material.

7. A shoe-bottom filler, composed of a comminuted filler; body-material mixed with a sticky binder and having a. mass-consistency easily separated or detached in segregated portions when cold rior to use but setting to a tough, strongly coherent consistency, adherent to leather and permanently pliable when in the shoe bottom, said binder consisting at least inpart of a sticky, low

melting base and a restrainer consisting at least in part of s'ulphite pitch, said restrainer in proportion capable of holding in check, when in a shoe, the normal heat-sensitiveness of the base so as to maintain a practical stiffness and prevent undue softening of the filler under usual conditions of use.

8. A shoe-bottom filler, comprising at leastin part sulphite pitch, a waterproof component, and comminuted filler-body material, mixed together to a doughy sticky mass, adherent to leather'when set in a shoe and thereafter permanently pliable. 9. A shoe-bottom filler, comprising at least in part sulphite pitch and powdered mica, a waterproof component, and comminuted filler-body material, mixed together to a doughy sticky mass when ready for use, and when set in a shoe adherent to leather and-permanently pliable.

10. A shoe-filler, containing hard wax-tailings tempered with Lima oil, and sulphite pitch.

11. A shoe-filler, containing hard waxtailings temperedwith Lima oil, sulphite pitch and powdered mica.

12. A shoe filler composition of thetype set forth comprising a binder and a comminuted solid component which hasla natural tendency to flatten out in a plane parallel to the direction of a force applied for smoothing the composition upon a shoe bottom.

v13. A shoe filler composition of the class described comprising a binder and a body component comprising discrete scale-like particles which tend, when the composition I is spread upon a shoe bottom by the aid of a knife, to'assume positions parallel to the plane of the spreading knife.

14. A shoe filler composition of the class 5 described comprising a binder and a body component comprising minute discrete scalelike particles of non-absorbent material.

15. A shoe filler composition of theclass described comprising a viscous binder,

ground cork, and a sleeking component, the 10 latter consisting of solid particles of nonabsorbent inert material adapted to transmit heat among the cork granules, said solid particles being of such characterv that they slip or glide easil upon one another. 15 In testimony w ereof, I have signed my name to this specification. I

ANDREW THOMA. 

